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First SpaceX spacewalk: Polaris Dawn mission launch date, details (www.cnbc.com)

submitted 2 months ago by [email protected] to c/[email protected]

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[–] [email protected] 4 points 2 months ago (1 children)

If I recall correctly, there will be a several hour long prebreathing phase then several more hours for depressurization phase during this spacewalk.

As far as electronics are concerned, I think Dragon uses redundant consumer grade computers with consensus algorithms. That might not be enough for high radiation environments like high earth orbit though. I’d be curious to hear official word on if that’s still the case.

[–] [email protected] 2 points 2 months ago (1 children)

as in, depressurization will take several hours? That seems extreme.

[–] [email protected] 1 points 2 months ago (1 children)

I believe that’s correct. This allows the astronauts to adjust to the pressure changes (they operate far, far below 1 atm) as well as abort if anything goes wrong with the suits. This is the first test of these suits after all.

[–] [email protected] 1 points 2 months ago (1 children)

It makes sense that the astronauts would need time to adapt to the pressure difference, but...

This is the first test of these suits after all.

Surely they've been tested on earth before launch???

[–] [email protected] 1 points 2 months ago

Yes, but the microgravity plus radiation environment makes for a fundamentally different thing than testing in a lab!